h1 {
    font-size: 55;
    text-align: center;
    color: cadetblue;
}
.nav {
    height: 50;
    width: 100%;
    background: aquamarine;
}
.img {
    width: 500px;
    height: 350px;
}
.nav li {
    width:calc(100%/5);
    height: 50px;
    line-height: 50px;
    list-style:none;
    text-align:center;
    float: left;
}
.nav li:hover {
    background-color: aquamarine;
    color: black;
    font-weight: 300;
}
.subMenu {
    height: 200px;
    width: 400px;
    background: lavenderblush;
    display: none;
}
.nav li:hover .subMenu {
    display: block;
}